Electric battery and accumulator.



' of the battery vessels, owing to the want of FLORENT SABLON, OFFAGHES-THUIVIESNIZ,

FRANCE, ASSIGNOR TO SOCIETE ANONYME ELECTRIQUE DE 'CHUMESNIL, OFCHUMESNIL-LEZ-LILLE FRANCE.

ELECTRIC BATTERZZ AND ACCUMULATOR.

1 085,374. Specification of Letters Patent.

No Drawing.

T0 (ZZZ whom it may concern Be it known that I, FLonEx'r SABLON, of 3Place Victor Hugo, Faches-Thumesnil, Nerd, in the Republic of France,have in vented Improvements in Electric Batteries and Accuinulators, ofwhich the following is a full, clear, and exact description.

For the purpose of preventing the plates and the electrolyte from movingabout in electric batteries and especially in electric storage batteriesor accumulators, use has been made of porous materials of all kinds, forinstance asbestos in the fibrous state or in the powdered state, carbon,porcelain, kiesclguhr, and generally all porous ma terials which areinert to the acid constituting the exciting liquid. Sto'age batteriesconstructed in this manner are attended by the following drawbacks: Thepores of the materials used for preventing movement are so large as toallow of the entrance therein of the metallic oxids which in storagebatteries travel from one pole to the other during the charging anddischarging of the battery. The result is that these materials be comevery soon conductors of the electric current, so that the storagebattery loses its charge and ceases to be 01 any practical use. Furtherwhen these materials are employed in the powdered state they becomeagglom erated and form together with the oxids very soon a compact mass,which prevents the batteries and accumulators from Working under goodconditions. In time, these agghm'ieratcd materials form a compact hardblock, which often causes the breakage elasticity of the said block,which hinders the free expansion or swelling of the plates.

The present invention has now for its object to provide improvedelectrical batteries and storage batteries or accumulators which willnot be attended by the aforesaid drawbacks.

The invention consists substantially for the purpose of preventingmovement in primary and secondary batteries of a special material in aparticular state of subdivision. The texture of this special material issuch that the pores are so minute that the oxids and metallic particlescarried along by the charging and discharging operations are unable topenetrate therein. Owing to its Application filed August 15, 1913.

Patented Feb. 2st, Twist.

Serial No. 784,869.

particular state of subdivision, the said material is unable to becomeagglomerated,

while it insures a complete immobilization" of the electrolyte and theplates and consequently a permanent and good operation and a long lifeof the batteries, notwithstanding-the shocks or vibrations to which theymay be exposed. This im rovcd 1naterial consists of an asbestosporcelain having such small pores that the oxids and metallic particlesare tumble to enter thercin. This ceramic material of asbestos iscomposed preferably of a double silicate. o'l' magnesia and lime, suchas asbestos (in the proportion of about T0 per cent.) and of atri-silicate of magnesia, such as stcatite (in the proportion of about30 per cent.)

The very hard material obtained by baking the above mixture is crushed(by means of any suitable crusher or breaker) into small fragments ofmedium size of about a millimeter. In sitting the crushed product, caremust be taken to eliminate the powder and dust as well as any lumpswhich are too large for the purpose in view. In fact it' the powder ofthe product were used, the same drawbacks might be experienced as withthe powder of other materials. On the other hand it lumps of too largesize are used. then the resulting contact and packing would not besuflicient to hold the oxids and to prevent them from becoming detachedand falling to the bottom of the battery vessels. The small fragmentsproduced as hercinbefore described, that is to say the non-granulatedparticles, have rough surfaces which enable all these fragments orparticles to engage with one another in such a manner that the packingthus produced will have a great homogeneity and will insure at allpoints a sufiicicntcontact for holding the oxids. Moreover these veryhard fragments which are engaged and so to speak, hooked into oneanother, will yet as a whole allow of a certain amount of play, thusimparting to the mass a relative amount of elasticity which will .permitof free expansion or swelling of the plates without the risk of breakingthe battery vessels or of causing" an agglomeration of the mass. Thefragments oi the special material employed absorb about three-fourths oftheir weight of the exciting liquid, while there are still left belil)lllll Correction in Letters Patent No. 1,088,374.

tween them sufiicient interstices for receiving and retaining a certainquantity of lime and a tri-silicate of magnesia, the said compositionbeing divided-in small fragments having the size of about one millimeterso as to prevent movements of the electrolyte and of the plates and toprevent the formation of an agglomerated compact mass.

The foregoing specification of my improvements in electric batteries andaccumulators signed by me this thirty first day of.

July, 1913. I

' FLORENT SABLON.

Witnesses:

LEFE CERL, ALFRED C. HARRISON.

Copies of this patent may be obtained tor five cents each, by addressingthe Commissioner of Patents. Washington, D. 0.

in the Patent Ofice.

[SEAL] It is hereby certified that the name and residence of theassignee in Letters-Patent No. 1,088,374, granted February 24, 1914,upon the application of Florent Sablon, of Faches-Thumesnil, France, foran improvement in Electric Batteries and Accumulators, was erroneouslywritten and printed as Socit Anonyme'Electrique de Chumesnil, ofChumesnil-lez-Lille, France, whereas said name and resi' dence shouldhave been written and printed as Socz't Anonyme Electrigue de Timmesnil, 0f flumesm'l-lez- Lz'lle, France; and that the said LettersPatent should be read with this correction therein that the same mayconform to the record of the case I J. T. NEWTON,

Acting Oommissioner of Patents. I

